package com.ledi.guns.core.shiro;

import java.util.ArrayList;
import java.util.Collection;

import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.pam.ModularRealmAuthenticator;
import org.apache.shiro.realm.Realm;

public class CustomizedModularRealmAuthenticator extends ModularRealmAuthenticator {

	@Override
	protected AuthenticationInfo doAuthenticate(AuthenticationToken authenticationToken) throws AuthenticationException {

		// 判断getRealms()是否返回为空
		assertRealmsConfigured();
		String shiroRealmName = null;
		if (authenticationToken instanceof AlipayAuthToken) {
			shiroRealmName = ShiroAlipayAuthRealm.class.getName();
		} else {
			shiroRealmName = ShiroDbRealm.class.getName();
		}
		// 所有Realm
		Collection<Realm> realms = getRealms();
		// 登录类型对应的所有Realm
		Collection<Realm> typeRealms = new ArrayList<>();
		for (Realm realm : realms) {
			if (realm.getName().contains(shiroRealmName)) {
				typeRealms.add(realm);
				break;
			}
		}

		// 判断是单Realm还是多Realm
		if (typeRealms.size() == 1) {
			return doSingleRealmAuthentication(typeRealms.iterator().next(), authenticationToken);
		}
		else {
			return doMultiRealmAuthentication(typeRealms, authenticationToken);
		}
	}

}
